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Finding the Fourth Proportional to 538,329.34, 742,911.31 and 308,928.59

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Solution

The fourth proportional to 538,329.34, 742,911.31 and 308,928.59 is: 426,331.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,329.34 : 742,911.31 = 308,928.59 : x
  2. Step 2: Convert to fraction form
    538,329.34/742,911.31 = 308,928.59/x
  3. Step 3: Cross multiply
    538,329.34x = 742,911.31 × 308,928.59
  4. Step 4: Simplify right side
    538,329.34x = 229,506,544,124.88
  5. Step 5: Solve for x
    x = 229,506,544,124.88/538,329.34
  6. Step 6: Final answer
    x = 426,331.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.